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Step 5:
1.
Insert the (5) tactile momentary push-button switches into their solder holes
on the man PCB. Four (4) of the push-button switches are installed at the
bottom right hand corner of the PCB and one push-button switch (reset
switch) is installed at the top right hand corner of the main PCB. The
switches are designed to ―snap‖ into the solder holes and will stay in place
prior to soldering. The pins of the push-button switches are arranged in a
rectangular pattern must be correctly aligned with the solder holes. ( Figure
18)
Figure 18
2.
Turn the main PCB over, apply a small amount of flux on the pins of the push-
button switches and solder the pins.
3.
Clean the solder joints with a Q-Tip dipped in alcohol and dry the joints by
dabbing with a paper towel or dry Q-Tip.
4.
Take a moment to examine the main PCB prior to final assembly. If there is
any remaining flux or solder residue, now is the time to clean it off.
5.
Insert the PIC18F2550 microprocessor into the 28 pin DIP socket.
The
microprocessor should be aligned with pin 1
on the right hand top
side of the DIP Socket.
The pins of the microprocessor may need to be
slightly pinched to make insertion into the DIP socket easier, however take
